34 



divisions. Basal portion of frond comes in contact with substratum by 

 means of basal pinnulae (which are transformed to root-like fibres). 

 Main branches mostly twice pinnate, very patent and longer below, 

 gradually becoming erecto-patent and shorter above, and thus the 

 outline is pyramidal. Primary pinnae patent, usually simple and linear 

 in outline, slightly tortuous, often 2 cm long, elegantly furnished with 

 secondary pinna}. Secondary pinnae 1-1.5 mm long, rising at every 

 third or fourth node, patent, dichotomous or sometimes subpinnate, 

 branching and bearing stichidia along the inside. The number of 

 articulations intercepted by primary and secondary pinnae varies from 

 2 to 5, rarely more, but 3 or 4 are common in proportion. Pinnulae 

 subulate, monosiphonous for the most part, some with a few basal 

 cells polysiphonous, arising from every 2nd node, sometimes forked. 

 Stichidia lanceolate at first, linear-lanceolate or oblong and apiculate 

 when fully grown, compressed, with an one-cell-long polysiphonous 

 pedicel, coated with transversely arranged rectangular cells. Articula- 

 tions half, or subequal as the diameter in basal portion, little longer in 

 the median portion of branch, again becoming subequal in pinnulae, 

 and three cells are seen in surface view. Color pinkish-red. Plant 

 soft and flaccid and closely adheres to paper in drying. 



Remarks. This plant together with Dasya Notoensis mihi belongs 

 to the subgenus SticJwcarpus, according to J. Agardh's Till Alg. Syst. 

 VI., and is related to D. subsecunda Suhr, from which and other- 

 related species, however, it differs in the number of pericentral cells, 

 it having the fewest of all. 



Dasya notoensis sp. nov. 



Diagnosis. Frond, filiform, compressed, a few cm high, ecorticated, 

 4-siphonous, 3-4 times alternately pinnate, distichous. Primary pinnae 

 or branches patent, subimbricately clothed with secondary pinnae which 

 are simple or compound, corymbose toward apex. Lower pinnae of stem 

 and main divisions short, and correspond to secondary pinnae of branch. 

 Secondary pinnae arising from every 2nd or 3rd node, dichotomo-pinnate. 

 Pinnulae monosiphonous, subulate, arising from every second node, 



